PIN US. GERMINATION. 161 



4. The seed is usually carried upwards on the apex 

 of the cotyledons, which, with the hypocotyledonary stem 

 elongate greatly. 



5. The plumule develops, forming numerous acicular 

 leaves. 



N.B. The cotyledons turn green while still protected 

 from the light, below the soil, and within the testa. 



